Herebelow my Polylang settings:
I use a static frontpage
The language is set from the directory name in pretty permalinks
Example: http://myswebsite.com/en/my-post/
Remove /language/ in pretty permalinks
Example: http://myswebsite.com/en/
Detect browser language : When the front page is visited, set the language according to the browser preference
Media : Activate languages and translations for media